@@ -529,9 +529,9 @@ def create_temp_file(name: str) -> None:
529529###Avoid side effects
530530
531531A function produces a side effect if it does anything other than take a value in
532- and return another value or values.A side effect could be writingto a file,
533- modifying some global variable, or accidentally wiring all your money to a
534- stranger.
532+ and return another value or values.For example, a side effect could be writing
533+ to a file, modifying some global variable, or accidentally wiring all your money
534+ to a stranger.
535535
536536Now, you do need to have side effects in a program on occasion - for example, like
537537in the previous example, you might need to write to a file. In these cases, you
@@ -541,8 +541,8 @@ several functions and classes that write to a particular file - rather, have one
541541
542542The main point is to avoid common pitfalls like sharing state between objects
543543without any structure, using mutable data types that can be written to by anything,
544- and not centralizing where your side effects occur. If you can do this, you will be
545- happier than the vast majority of other programmers.
544+ or using an instance of a class, and not centralizing where your side effects occur.
545+ If you can do this, you will be happier than the vast majority of other programmers.
546546
547547** Bad:**
548548
@@ -572,5 +572,22 @@ print(name) # 'Ryan McDermott'
572572print (new_name)# ['Ryan', 'McDermott']
573573```
574574
575+ ** Also good**
576+ ``` python
577+ class Person :
578+ name:str
579+
580+ def __init__ (self name ):
581+ self .name= name
582+
583+ @ property
584+ def name_as_first_and_last (self
585+ return self .name.split()
586+
587+ person= Person(' Ryan McDermott'
588+ print (person.name)# 'Ryan McDermott'
589+ print (person.name_as_first_and_last)# ['Ryan', 'McDermott']
590+ ```
591+
575592** [ ⬆ back to top] ( #table-of-contents ) **
576593